Automatic or semi-automatic telephone system.



A. BETULANDER, N. G. PALMGREN & 0. GRAHN, AUTOMATIC 0R SEMI-AUTOMATIC TELEPHONE SYSTEM.

APPLICATION FILED JULYH. \915.

I Patented June 20, 1916.

G. A. BETULANDER; N. G. RALMGREN 6L O.GRAHN.

AUTOMATIC 0H SEMI-AUTOMATIC TELEPHONE SYSTEM.

APPLICATION FILE D JUKYIZ, 19%5- Patented June 20, 1916.

6 SHEETSSHEET 2.

'G. A. BETULANDER, N. G. PALMGREN & O. GRAHN.

AUTOMATIC ORSEMI-AUTOMATIC TELEPHONE SYSTEM.

APPLICATION FILED JULYXZ' I915.

Patented 111111620, 1916.

6 SHEETSSHEET 3- ER, N. G. PALMGREN & O. GRAHN.

G. BETULAND APPUCAHOH FILED IULYIL HHS.

Patented June 20, 1916 6 SHEETS-SHEET 4 G. A. BETULANDER, N. G. PALMGREN & O. GRAHN.

AUTOMATIC 0R SEMI-AUTOMATIC TEL PHONE SYSTEM.

APPLHIATION FILED JULYIZ.

Patented J um 20, 1916.

6 SHEUS-SHEET5.

M m ms G. A. BETULANDER, N. G. PALMGREN & O. GRAHN.

AUTOMATIC OR SEMI-AUTOMATIC TELEPHONE SYSTEM.

APPLICAfiON FILED JULYIZ' I915.

Patented 11116 20, 1916.

6 SHEETSSHEET 6- toothed pawl '5 which engages the teeth 5. After the dial has been. set. it can only returned to normal posiiion' by the action of this magnet 6 the pawl controlling tho movement of the dial in such a manmgr that the latter is rotated half a. tooth for each movement of the pawl.

The selector on the right of Fig. l of known con truction and cousins of relays only, via. a oerics of switching relays 8. a series of auxiliary relays 9 and lwo controlling relays 11 and 12.

For \the purpose of establishing a wanted talkingcontraction, the subscriber first re-' moves his receiver from the. hook 131, the (solver and transmitter being thcn in the ordinary way branched lietwccn tho lino wires 1% and 15. A circuit thus closed, cxtending over both tho lino branches and through a line relay (not slumn) ionutcd at the exchange. Said relay. upon operating. czmsus SllbSCIlbel'lS line to he connected will an idle jun tion lino-ll 1? through contnciu 18, if.) L :onnuoting relay 20. The sub sidiary me us for efi'onting this commotion are. not sh )wn as they are well known and of no importance. for the presentinvention. The, means for ellocting the connection are descrihod in a. co-ponding application for u United States Patent No. 832,471 and in the specification of British Patent No. 9840 of 191i. At the moment of connection relay 20 and an auxiliary relay 21 are simultunoously energizod ovor (circuits not 'shown in the drawing. A circuit a; thereby established opornting subs rihers impulse reluy which (:loscs circuit i) locking relay 2i illlil circuit (2 energizing slow acting relay $.30 which c 7:398 51 holding" circuit (ll-for relay .20 so that though this circuits. by which rcluys 2G and 21 werc energized, are iu'uiu-diutcly oponod, those relays are nuuntnincd unorgiznd. lleluy 3O closes; Circuit energizing r ziy 35 which attracts its urnuiture. and pr gmrnsi Lie c rcuit of u scloctor connecting lay 3?.

In tho drawings tho invention rcgrc sentoll as applied to a system in which tin:-

solector nssigncd in common to a plurality ol junction liucs 1 3, 17. though (his inrnuitcriul. In ordcr to prevent the simultaneous connection of two or more suliscrihcm: to the common scloaztor. u succcssiou doi'icc, provzdml to control contucls 38 in eluded in tho circuits of the selector coir neoting' relays 37 assigned to the different junction lines. in such a manner that only one subscriber at :1 time can lic. conncctcd to the selector. ll the sclccl'or is iron. contact 38 innnodintoly closcd. relay 3? living thou cnorgizcd whorchy lino. bran-oh 16 is connectc l' thin-ugh. contacts and 3-0 to an impulse lay belonging to the. selector. At the .'-:-.ilne tirna circuit 7 is closed extending from earth through hack rontncts of all auxiliary relays 9 and through all swilfihinjg roluys i). which theroliy causo'l to operate.

All the operations hitherto described are completed within a very short period and before the subscriber has operated his numher-svitclr When the subscrillor turns the dial, the receiver and transinittrr are cut of? at Contact 26 and magnet 3 in out in through Contact l1. Magnet (3 not. however. ogu-ruteil until the dial has been turned to the. finger abutment. us. nuring the setting: oi the (liul. u conturt closed whcreliy mug? not Sis short circuited and the loop (lltlllll is nniintnincd closed. If. for instunco. lihe dial is set for digit -l. contact spring 3 is on the. top oi thc. filth pin 1 ut the cnl of tho inorcmont of thodiul. Win-n tho subscriber thereupon rcleuseu tho (liul. comm-l. is at iirst oponcd. unl z'ncl. (3 is thou supplied with our'ent through rontucts l and ll and.

upon energizing. :u'tuutcs puwls 7 so that tho dial allowed to rotate hull u tooth. iii-Ct 3. magnet nrunrturcs. Thc luttcr. upon cloi ncrg'r/iiiui. oprn: circuit 71 causing rcluy 21 lo rclczwc h; urnuituro. Slow ucling rohry 30, l oworvr. keeps its uruuiturc attracted preventing thulzallling conncotion from lining lH'OlCQIi. At tho miurliimo magnet G lur rolcuscd pawl 7 and tho dial has therefore lr-ccn rotutvd hull 21 tooth more. \Vhcn contact 3, l lllllb again cloned on the top of tho ncxl; pin. i circuit- ;y is closcd through a resistunco 4J1. rcluy 25. mugnct and the other windin; of 25 to lmttcry. As rcsistuncc 43 is now inrludod in tho loop circuit. the. current is not mlron g cnough to ouuso iuug nct G to opcrnto nurvl T;.rclu v on the olhor hand attracts its armature.

ll lhc sclcctor is not'inmuuliutoly umilable. thc number-5witch. ultcl" having been turn buck for one tin-u h. nuiintuincd in its lm, c l position. \Vncn lhc selector llQ" Con} l if-l' thus opcncd and mins-'w;ucnlly comics idle. however. rcluy li is PhLl'glZUll' and coxu ilctos circuit )1. through rcluys 2 3 and ill lioluy 23 opcratcs, locks itsclf (circuit i} and culs in rcluy 21 (circuit'j). Although circuit is then opencd, yctzl'he loop circuit is nmiutuinod l sed through circuit .l'. Furthcrnuu'c. rcluy 3 is omryjizcd wh-I-rcliy circult Z is closed through relay 12. which. attracting its urnmturc. locks itself through circuit /12,. (intuit n is then closed through rcluy ll. Relay ll attrncls its urumlurcs and locks itself through circuit 0. Further. upon the onorgizutiun of relay 12, circuit is closed througl'r the first auxiliary relay 9. which therefore energiz s and looks itscll (uirruit (1i through a i'esistuucov ll.

"The first. switching relay 8 is maintained cnorgized by circuit Relay 9, upon c.nc"- gazing, clones circuit 8 whereby relay 49 is caused to operate. Circint z' is thus broken -.1.; O- m} m v.3 09 t lidlll 1w ago ano u iv at er, in 16 half a tooth. (Iontm-t 3 4 is again upcnui t-iir -Whereby magnet 6 and impulse why :13- are deiinergized.

The operation is than itptiltkki in a Ewiliiiifi! manner. .i'iuhiy .21 i(ii:2-?0- it: minutiae: i cuts in 1' stance i 51') that when with t 3 i is again vinswh mngm- \minut he wntuii immediately, 'ihu xwming Hi :w 21 x'u-pi-epzu'vs tfilfllit 12 ihi'mzgh whit iii, and 239. said (iX'Cllii iitiiifi mmpictwi \i'hvli cuntm't 2)- i iS (rinsed and rvhi 2 is th -why again energized. Thu wmnal im miw now operates the second pair of i'vhiys' F4 and U in the same nmnnei' {is titf'i'i'ii iii in 1%: spgct of thv first pair. the warren: HOW nuw ing through hzuih mntnvt mi iiz'vi u-hi and working cuiitzn-t 0i swmui l'tifilfl 5. rim-um] relay 9, 11pm: zittmctlng" its zmhntmw, the circuit m why it) which upw'znw opens Cil'Lliits h and 5 art 'itiilfi. L we? Rvsistnm'e i3 is then short tin-ninja whmwby the line current iH strengthened Mui 1mgnet (3 is caused tn n' ci'zite and so am.

From the :liHH'C le-vripiinn ii '2' that the numberswitch :mii the tuaiiy (:unti'ni liiCii uthei' Sti my a manner that t ll ni mhw-wzxv take a new step ii. I lih. curi'cspuniiing iyh and, Yin Yii'fiih ihu pin 2 having {)liSSiti and 'i htrfl'i 3-, i inning been upeiwd, the Liiiii is mtuiawi. a. iwmrv. half a tooth more, ("(Hitilti'h and U being then operntcsh an that umgswt i3 ismt Mi and the lHi'fifiYiBl unii izzm: aiii'tii' tiii hriiigmi norms the iimki'ilii 'ilmk circuit is tin-i :t 'i wfl! ceivor and tsunami urnmtww um} (um wh-i-tm. itciriy i tum, vii-units h and J n h z m. soqm'ntly In further ixx'iu-i me: his emitted. After :1 ahm'i mi n-m th ,Jimv

'sond u. vurront through a mnnwtingzj n-hu" x Ilii i zmmhng: t

1 ml intu- 1 and 51m- Wiws t3 muting:

1; in be P m5, mam; .76. 1?

n PM

New next 1'" wmzzw, ma, m; in

me manner as in Fig. Ineimnl of time i'onlncin 59 and of Vim l3. r-mnncl iie vii-e need and is rer-reseni'cl nmtiwilly by 3E r nnin/t urn: H nnil {Wu ion n T3 and Ti The cloning f th i n .-s H, T and Tl: i cl'i'wic l HS in l my; the 'l'rec l'ilUYliZlkliijUf fill" iinii v 'o. 2 limited by the piw; 5i" and (in of hi izil is provided with a conopnrmril lz v "inn iinpilbe manner ilmt "ilii fil 'l 7?. T- H .1 lirsi opening: oi lire inns-nine ilit'h'fi ii and inn rcniziins closwl nnlll ilzi ilinl reziclacs iis nornnzi positi n when coniirn'i ii. T in, gain opened 1)) ii! inn of iln alizil. in this; rmngenwni iv 'crs: anal 3"? an nniiicii In llnwr we im {in mm ntrnrlinn o? Kin Qa lfii is nnnln k fs in'n ilw zcra' ivcr is lii'lml. ii,

. hi cnn mi rnplinmr are ila lwi'nrc ln'nigrml zi ji f' the line lax-anchor: ilirong 'ii (UiiUll'ir 1 zinii ii. ii'lnn lie liilil 7 then 1-H contact 1k T5 l1? int (lusvii in: a moment, lint Without, inging; Elie iinrci i coniliiinns. Tulane-- i engage-i tlic emu El i cl iacil. the dial. vunizzct fil.

(illinnng; line i:

upen il :i n

being after this lietn'cen tlic lini- TL "#3 {cis'aini Ll inniinnineil cminc 'ieil lminwinjn lln'nnfjli rnnLu-r N l iwli Mfi, i: u mwsi. wh n wntiict H. in upcnwl mil isicn ronmct Ti. if? in -Z'iU--(\l l inn .lF, Hwnl. l' on lic n ling: n? rune Ii n relay v :i cnei'git zw locking A i'i' rvlm 2i lining than npvnwl m ilmi rein}; il

.\1 lie following inn-- r lczisw iis 71 rnnunrc.

Ti. 73 line cup ls rclnv 69 mini relay W.

inun nprnri circuit 1., Upon the vex? *i'pel fl ii ll 1 line circuit at cnnia-ri 51'. vlrv iii 1 or rem is iwziin Blur/H1 by rein}; em-owl impulse.

ii-ion -vniinneii nin'nwi poeiii n when in this m inner the. opera until the iiilll reaches its i. the line circuit is rinsed in the last iillltf. .n tlic same time c nflicts 7&5 and "3 an: opencil and conini i ii if;

A: on acting: relay If? now remains de energized. rl' z'clemce, its nrnmtnres after a $5 .01; pi-rim roirv 21 then rewiring cur- Et'lli, ore;- iircnn. J :HHl locking itself through circwil illlllll'lilflivliy iii'ier slow acting rein I rclmses a inatnrea In the mwmiinw :2 glow acting relay 12 of the Helm-{or has releuaeil. its armature and has mniplctwl circuit 1 to the above mentioned Mini-hing derive by which a disengaged innciinn oi inc onp wnnieii is selected and omic! ling z-clny ii ire pei iiieil.

ln zwhilit-li h'flh \Illll Fig. .3 this arrange in Elk! illiYilH-iilfi among others that irrispiinn n iiiuiillc circuit effected min ii wlc-ior (low not ncwl to lie carelllllf! riiliiptr-il nitli regard to illk! condition time ilic line circuit. after lii 'ing once been opcncil, innst nol be ('iUtSlXi again before impiilnc contact (3? iii! been opened. This is minim-(l. ktilllllilllg to Fig 7" by magnet 6, upon reiezzsingi HS nrn'mtnre. in'nneillntcly op ning; comm-t 81 inclnileii in ihc lino circnil. \ih-r this the lino .-ircnil. cannot be eluemi will; VU'HQZHK ilevirc ii, 7* has been \(il1dl.'*l. Pig. T n has Simpler oirinits llll'iw il il w X'Ulilyb' Hill} G9 0'! Fig. 6 are )'EL-llii niiii it we rinini is:---

In :L tvlwplmne system. the, of aelcrtnrn impulse control ilie seicctors,

l 1 Hill cmnbinzition impulse relays adapted tn 'ne npi-rntrii by variations of the line cnrrent :inn to rnntrol the setting of the selcciors, electro-n1ngnetic means adapted to be operated by ntlier '11 'izitions of the line current for ronirolling the impulse transmitivrs "dlli means for varying the line current.

2. in ;i Lciepimnc vriem. the conniinati0n of :wleciesrs. lKHiHlir-lL' triinemiti'ers adapted n t'fHlii'Ol (he seirciorsq impulse relays adaptril to lie npvruieil h intmruptions of the line cnrrv uni-i in control the seetiin" of the so i l: operated by variations of the line current 33. the hQlQCiUl' then receiving it irnnsinitters adapted to 16 and m comm the mzmbm swiich m varying the hue on rent male z prim; vim im- Ch, 21?). impu 4 PH]? the cmnbiz'mvi by Vanni- Lane m the ion of :1 seiechnz a I:HXHbQF-SWitfh ada med -ma Q m- :ulnptm? m in rummi Ihv s9 an impulse seuc'ting iafifi'ns 0f the uevimlimited at flw whange and adapted he mini mnnai H0 mam wrwwitvh, a relay in nadir): 1 n0 mnent and in contra! but ihr :svmimg device and the t clvphone ajcs lv m H12 mmbiim @Nurun, a numberasw F21 adapted t1 mm. rm? the selmmr, :m. in -=mdingz 511 E m {mate-VI at i Yz sgfl'ml um; u .L 1 and W m kmzukw 14. In a telephone system, the combination of a selector, :1 number-switch adapted to control the selector, an impulse sending device located at the exchange and adapted to control the number-switch, a relay included in the line circuit, a slow acting ah);- iliary relay adapted to short circuit such relay, and an impulse relay adapted to he operated by variations of the line current and to control both the impulse sending'deviee 10 and the circuit of the auxiliary relay.

GU'ITHILF ANSGARIUS BETULANB'ER NlLS GUNKAR- PALMGBEN.

OSCAR GRAHN. 

